THE KNOWLEDGE FEED

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Morning Cup of Links: DIY DNA Testing

Miss Cellania

Hugh Rienhoff's daughter has a rare genetic defect that doctors can't identify or treat, so he took it upon himself to sequence her DNA.

4 Governors Who Did Time

Chris Weber

When I met Rod Blagojevich at a Chicago Cubs game in 2007 (that's us), he was a wily incumbent who had just won easy reelection despite longstanding rumors of corruption.

How Did You Know? - {day 5}

David K. Israel

If you've made it this far, I commend you! One more puzzle to solve and you're home free.

The Quick 10: What 10 Movie Props Later Sold For

Stacy Conradt

1. The sled from Citizen Kane. One of the balsa wood sleds (there were a couple, and one pine sled) was sold for $60,500 in 1982. Its new owner? Steven Spielberg. 2.

Peter Ward on Mass Extinctions

Chris Higgins

Author Peter Ward thinks he knows how the Earth will end. Well, perhaps not end, but cease being Earthlike -- the comfy place we know and love that supports mammalian life.

One More Book To Give Away

Jason English

For the last of our January book giveaways, we asked you to design a class for the fictional mental_floss_university.

Who Invented the Wheelchair?

Floss books

The first wheelchairs didn't just transport the disabled. They were also good for toting dirt, stone and construction supplies around

Why Is The Middle Finger Offensive?

David Clark

The middle finger is one of our species' oldest and most ubiquitous insulting gestures. But why is waving one of your fingers offensive?

Lunchtime Quiz: Super Bowl QBs

Jason English

On Sunday, Ben Roethlisberger became the tenth quarterback to start in two or more Super Bowl wins. We've put two minutes on the clock.

Found: A Vampire Graveyard

Ransom Riggs

Ever since the Raiders of the Lost Ark rocked my childhood, I've been a big fan of anything that combines archaeology and the supernatural.

Brain Game: Write Right

You're starting a new year at a new school. You arrive in the morning with a notebook and most of the other essentials.

Morning Cup of Links: She's Gonna Blow!

Miss Cellania

Some particularly unusual units of measurement.

Boogie Woogie Piet

Andréa Fernandes

Tomorrow marks the 65th anniversary of the death of Pieter Cornelis Mondriaan, Jr., also known as Piet Mondrian (1872-1944). At the request of readers Lauren M.

The Bud Bowl: A Definitive History

Scott Allen

Editor's Note: This article originally appeared last year. On the subject of the greatest football dynasties of all-time, the 1970s Pittsburgh Steelers, 1980s San Francisco 49ers, 1990s Dallas

Photos: Our Readers And Their Famous Friends

Jason English

I asked for your best photos taken with celebrities and you did not disappoint. Here's a taste of what you guys sent us.

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